Lock construction



Feb. l1, 1964 T. K. REMKE ETAL 3,120,972

LOCK CONSTRUCTION Filed April 6, 1962 2 Sheets-Sheet 2 f 79 /oo INVENTORS THeoDon: KAR/ Perm/E By Env/m 7'. Mo/ver United States Patent O 3,120,972 LGCK CUNSTRUCTION Theodore Karl Remke, Grosse Pointe, and Edwin T. Monet, St. Clair Shores, Mich., assignors to Reinke, Inc., Roseville, Mich.

Filed Apr. 6, 1962, Ser. No. 185,701 7 Claims. (Cl. 29h-1&9)

The present invention relates to new and useful improvements in a heavy duty lock construction and more particularly to a heavy duty lock construction for inside mounting on the iiat surface of an outside swinging door, such as is found in an armored truck.

In armored vehicles now in use, considerable diiiculty has been encountered in the service and maintenance of the door locks (l) because of the excessive number of service parts required, (2) the necessity of having two sets of parts, one for right hand and another for the opposite hand, for use on doors which swing from opposite sides of the door jamb opening.

It is therefore a principal object of the present invention, to provide a simple and `dur-able heavy duty lock construction which will have a very minimum number of parts and will require little or no service maintenance during the life of the vehicle on which the lock is used.

Amother object of the invention is the provision of a heavy duty lock construction wherein the bolt is independently operable from either side of the door on which it is mounted, by the use of a knob and or key, the key replacing the knob on the outside, so as to prevent unauthorized entrance into the armored vehicle.

Still another object of the present invention is the provision of a single lock which has common mountings and can be used on right and left hand swinging doors with equal efhciency, without necessity of having to maintain an inventory right and left hand locks.

The above and other objects can be accomplished by the provision of a heavy duty lock construction having a generally hollow housing with substantially flat inner and outer faces; a central machined recess in said hollow housing forming bearing surfaces integral therewith, for guiding a movable, spring loaded rectangular bolt member; a rotational shaft journaled in said housing at generally right angles to said rectangular bolt member; cam surfaces on opposite sides of said rectangular bolt member; a first iiat cam having a rapid rise positioned on said rotational shaft, adjacent one of said cam surfaces on said bolt member; a second iiat cam positioned adjacent the opposite surface on said bolt member and in alignment therewith, said second ilat cam having a slow rise; an elongated opening in said rectangular bolt member intermediate the ends thereof for receiving an independent coupling means, said coupling means adjacent said second flat cam and a second movable member; said first rapid rise cam is operated by a knob secured to said iirst rotational shaft, while said second slow rise cam is keyed to said coupling means and operated by a key, said slow rise cam providing a mechanical advantage to render the key actuation easy; and a generally flat cover on the inner face of said housing to form a single unitary construction; displacement of either of said flat cam members with the key or knob, each independent of the other, operating to retract the bolt and thereby permit pivotal movement of the vehicle door.

Other objects of this invention will appear in the following description and appended claims, reference being had to the accompanying drawings forming a part of this speciiication, wherein like reference characters designate corresponding parts in the several Views.

In the drawings:

FIGURE 1 is an elevational View of a lock construction which embodies the present invention.

ICC

FIGURE 2 is a cross sectional View taken substantially along lines 2 2 of FIGURE 1.

FGURE 3 is a vertical cross section taken substantially along lines 3 3 of FiGURE l.

FIGURE 4 is a rear view of the lock construction shown in FIGURE l, with the cover member removed, as well as the slow rise flat cam and coupling means.

Before explaining the present invention in detail, it is to be understood that the invention is not limited in its application to the details of construction and arrangement of parts illustrated, since the invention is capable of other embodiments and of being practiced or carried out in various ways. Also it is to be understood that the phraseology or terminology employed herein is for the purpose of description and not limitation.

The lock of the present invention is made up of eight major parts, namely the housing, bolt, cover, two cam members, a coupling, a spring for pre-loading the bolt and an actuating handle or knob.

Looking at FIGURE 1 of the drawings, we note that the lock housing 1t) is of generally rectangular configuration. From FIGURE 2, we note that the housing 10 is of substantially the same uniform thickness. In FIGURE 1, each of the four corners 12, 14, 16 and 13 of the housing 10 are recessed and have located therein generally symmetrical relationship, four openings 22, 2d, 26 and 28, each of which is adapted to receive `a mounting screw (not shown). The heads of each of the mounting screws (not shown), of course lie below the hat surface 42 of the housing and in the recessed portion, thereby affording a measure of safety for the knuckles, when turning the handle or knob 32.

The handle 32 is of generally T shape and has integral therewith, a generally square shank portion 36. The shank .36 extends outwardly from the body portion of handle 32 and is threaded on the outer end 52 thereof. The shank portion 36 is journaled in the housing section 39, which extends outwardly from the generally iiat surface 42. The end of the housing section `39 is flat and in sub stantially parallel relationship to the flat surface 42 above described. The body portion 34 of the handle 32 is also hat as indicated at t and engages the ilat portion 45 of the housing section 39.

The outer end 52 of the shank portion 3S is threaded and has secured at right angles thereto, a dat cam member 62. The flat cam 62 is keyed to the shank 3d and positioned within the locking housing l@ by a threaded nut 54. The shank 36 and the threaded end portion 52 of shank portion 33 thereof, are of such dimension as to permit free and easy rotation of the hat cam 62, without any possibility of binding.

The bolt member 9@ is of generally rectangular cross section and is slidably mounted in the housing 1t). Both of the opposed vertical faces 92 and 94 thereof are undercut as illustrated to form cam receiving pockets 92A and 94A. The vertical edges 93 and 95 formed thereby, provide cam surfaces which are cooperable with the operating edge surfaces of each of the llat cams.

The central portion of the bolt 99 has an elongated opening 96 therethrough which is adapted to receive a cylindrical coupling member 14h, on which is keyed the second at cam 102. The inner end of the bolt @ti is generally square with the body portion thereof and has a spring retaining opening 9S centrally located therein, while the outer end of the bolt has a wedge shaped inclined cam surface 59 formed thereon. The spring member lili) at the end of the bolt 9@ positions the bolt in contact with the coupling member 1li@ and iiat earns 62 and 1,@2.

It will be noted in FIGURES 2 and 3 that the central longitudinal portion 72 of the housing it@ is raised and forms a flat bearing surface on which the iiat inner surface 92 of the bolt 9G slides. Additional bearing surfaces 7'7 and 7% are formed on bosses '73 and 75, substantially perpendicular and square with bearing surface '72., thereby providing accurate and inexpensive bearing surfaces in which the generally rectangular bolt 99 can operate.

rl`he bolt @il is positioned in the housing litt, between bearing surfaces 77 and '79 respectively and in contact with iiat bearing surface 72 in the housing lll. The pocket 92A is located adjacent tlat cam 62, with tb edge of the flat cam e2 in contact with cam surface 93 on the bolt gli, while nut 54 is rec ived in the central elongated opening @d in the bolt 9d. A compression spring lili? is positioned in the spring retaining opening 9S, between the end of the bolt @il and the end of the housing. By so doing, surface Contact between the edge of the iiat cam 62 and surface is positively maintained.

immediately opposite the irst flat cam d?. is located the second iiat cam lill/, whicn is keyed to a cylindrical coupling member lait? and rotates therewith, The iiat cam 1lb?. is adapted to be located in pocket of bolt 9i), in the same general manner as is fiat cam 62.

The rectangular cover member lill is generally dat, with the outer edges thereof being located by the recessed edge portion l2 of the housing it). The inner surface lll of the cover member lill forms the bearing surface which guides the last exposed surface 9d of the generally rectangular bolt 9i). The cover il@ is secured to the housing lil with screws inserted through suitable openings therein, which are in alignment with openings ft2? and i739 in the bosses 73 and 79 respectively. Openings 12'? and 129, of course, are threaded and eliminate the necessity of any loose parts in the housing, which might obstruct the normal operation or" the lock mechanism, should they become disengaged.

lt will now be readily apparent that independent rotation of either the handle 32, or the coupling lllll with a key, will cause the generally rectangular bolt to retract and move into the housing lil and that relative motion in either direction will cause same to operate. The first iiat cam 62 is operated through the handle 32, while the second iiat cam TJEZ is operated with the cylin drical coupling M0. The flat cam 62 has a rapid rise, while ilat cam N2 has a slow rise. This permits a more readily turnablD structure when a key is used, because of the mechanical advantage accomplished thereby. Rotation of the cylindrical coupling Mtl is made possible by inserting a tang (not shown) of a commercially available loclr into the rectangular opening le@ provided therein. Thus, when the lock is mounted a generally l'lat surface on the outside of the door is provided.

Engagement of the outer cylindrical surface MZ of the coupling lill?, with the radial surface 96A in the rectangular bolt 9d, as well as engagement of liat cams 62 and 102 with the undercut sections 92A and 94A forms a positive stop for limiting displacement of the bolt. Additionally, the provision of a generally symmetrical ilat cam conligurationV permits operation of the lock with rotational actuation in either direction.

From the foregoing, it is apparent the above described invention is simple, durable and inexpensive. It can be manufactured with modern mass production methods which require a minimum of tooling, resulting in a product which is superior to anything which is now available.

Having thus described our invention, we claim:

1. In a heavy duty lock construction for use on the doors of an armored vehicle, the combination or,

a generally rectangular housing;

a substantially iiat housing cover;

a bolt member in said housing, said bolt member oi generally rectangular cross section;

bearing means in said housing for support of said rectangular cross section bolt member;

an elongated opening in said rectangular bolt member, said opening located between the ends thereof and adapted to receive a coupling member therein;

s a rotatable member extending at right angles to said bolt member and piloted in said housing, said rotatable member in alignment with said coupling member;

a irst flat cam and a second iiat cam, said lirst dat cam cooperable with and disposed between said bolt and said housing, said second ilat cam member disposed between said bolt member and said cover, said rotatable member adapted to operate said iirst 'dat cam to retract said bolt member, while said second liat cam, which is independent ot said first iiat cam, is actuated with said coupling member which is keyed thereto, retraction ot said bolt member permitting pivotal movement of said armored vehicle door.

2. A lock construction as defined in claim l, wherein positive stop means are provided to limit displacement of said rectangular bolt when said liat cam members are operated.

3. ln a heavy duty lock assembly for use on the doors of an armored vehicle, the combination of,

a generally hollow housing having a substantially iiat mounting surface;

bearing means integral with said hollow housing for guiding a spring loaded bolt member;

an elongated opening in said bolt member, said opening dispose etween the ends thereof and adapted to receive a coupling member' therein;

a rotatable member piloted in said housing and extending at right angles to said bolt member, said rotatable member in alignment with said coupling member;

a first ilat cam and a Vsecond flat can said rst iiat cam cooperable with a cam surface on said bolt member, said cam disposed between said bolt member and said housing, said second dat cam coop-'arable with a second cam surface on said bolt member and disposed between bolt member and iiat mounting surface;

displacement of either of said flat cam members in either direction against .their respective cams on the bolt member, independently retracts said bolt meniber to permit pivotal displacement of said armored vehicle door.

4. in a heavy duty lock. construction, the combination a generally rectangular housing having a tlat mounting surface;

a machined recess in said housing forming bearings for guiding a generally rectangular bolt member;

an elongated opening in said rectangular bolt member intermediate the ends thereof, said opening to receive a coupling member therein;

a pair of cam surfaces on said bolt member, said cam surfaces intersecting said elongated opening;

a first liat cam positioned in alignment with said coupling member and in Contact with said cam surface on said bolt member;

a second flat cam positioned in alignment with said coupling member and keyed thereto, with one edge of said hat cam in contact with said cam surface on said boit member;

said iirst iat cam cooperable with a rotatable member piloted in said housing;

displacement or either said lirst or second dat cam against its respective cam surface on said rectangular bolt member independently retracting said bolt member to render tue lock operable.

5. In a heavy duty lock construction for use on the doors of an armored vehicle, the combination ot,

a generally hollow housing having a substantially mounting surface thereon;

a at cover on said housing;

bearing support means integral with said housing for guiding a bolt member;

iiat

a compression spring for pre-loading said bolt member, said spring interposed between the end of the bolt member and the housing;

an elongated opening in said bolt member, said opening located between the ends of said bolt member and adapted to receive a coupling member therein;

a pair of cam lsurfaces on the outside of said bolt member and intersecting said elongated opening;

a rst flat cam and a second iiat cam, said first at cam engaging one of the cam surfaces on the outside of said bolt member, While the second ilat cam engages the other cam surface on the bolt, each of the flat cams being in alignment with the coupling member, the first at cam being independent of tbe coupling, While the second flat cam is keyed thereto;

ysaid first ilat cam cooperable with a rotatable meniber extending at right angles to said bolt member and piloted in said housing, the rotatable member being in alignment with said coupling member;

6 displacement of said rst ilat cam in either direction retracting said bolt member, rotation of said coupling in either direction also retracting the bolt member, each Hat cam being independent of the other.

6. A lock construction in accordance With claim 5, wherein said rst ilat cam has a rapid rise and said second flat cam has a slow rise.

7. A lock in accordance With claim 5, wherein said cam surfaces on the outside of said bolt operate to positively limit the displacement of said bolt member.

References Cited in the le of this patent UNlTED STATES PATENTS Re. 17,084 Huiman Sept. 18, 1928 774,970 Phelps Nov. 15, 1904 1,559,037 Floyd Oct. 27, 1925 1,811,110 Best et al `Tune 23, 1931 

4. IN A HEAVY DUTY LOCK CONSTRUCTION, THE COMBINATION OF, A GENERALLY RECTANGULAR HOUSING HAVING A FLAT MOUNTING SURFACE; A MACHINED RECESS IN SAID HOUSING FORMING BEARINGS FOR GUIDING A GENERALLY RECTANGULAR BOLT MEMBER; AN ELONGATED OPENING IN SAID RECTANGULAR BOLT MEMBER INTERMEDIATE THE ENDS THEREOF, SAID OPENING TO RECEIVE A COUPLING MEMBER THEREIN; A PAIR OF CAM SURFACES ON SAID BOLT MEMBER, SAID CAM SURFACES INTERSECTING SAID ELONGATED OPENING; A FIRST FLAT CAM POSITIONED IN ALIGNMENT WITH SAID COUPLING MEMBER AND IN CONTACT WITH SAID CAM SURFACE ON SAID BOLT MEMBER; A SECOND FLAT CAM POSITIONED IN ALIGNMENT WITH SAID COUPLING MEMBER AND KEYED THERETO, WITH ONE EDGE OF SAID FLAT CAM IN CONTACT WITH SAID CAM SURFACE ON ON SAID BOLT MEMBER; A SECOND FLAT CAM POSITIONED IN ALIGNMENT WITH SAID COUPLING MEMBER AND KEYED THERETO, WITH ONE EDGE OF SAID FLAT CAM IN CONTACT WITH SAID CAM SURFACE ON SAID BOLT MEMBER; SAID FIRST FLAT CAM COOPERABLE WITH A ROTATABLE MEMBER PILOTED IN SAID HOUSING; DISPLACEMENT OF EITHER SAID FIRST OR SECOND FLAT CAM AGAINST ITS RESPECTIVE CAM SURFACE ON SAID RECTANGULAR BOLT MEMBER INDEPENDENTLY RETRACING SAID BOLT MEMBER TO RENDER THE LOCK OPERABLE. 